Automatic mixer and charger for gas-engines.



A. P. GUBRUD.

AUTQMATIO MIXER AND CHARGER FOR GAS ENGINES.

APPLICATION FILED MAR. 15,1911.

Patented Mar. 18, 1913.

2 SHEETS-SHEET 1.

ammo n m H M W -m ww a m w m.) R F V (10 a m u m M a, a f e fi m .&

A. P. GUBRUD. AUTOMATIC MIXER AND CHARGER FOR GAS ENGINES.

APPLIOATION FILED MAR.15, 1911 NITED STATES,

ADOLPH Pi GUBRUD, 0F HUDSON, SOUTH DAKOTA.

AUTOMATIC MIXER AND CHARGER F011 GAS-ENGINES.

l all-136,666.

To all whom, it may concern:

Beci-t known that 1, Amount P. GUBRUD, citizen of, the United States, residing at lludson, in the county of Lincoln and State of South Dakota, ha ve. invented certain new and useful Improvements in Automatic Mixers and Chargers for Gas-Engines, of which the following is a specification.

This invention comprehends certain new and useful improvements in charge forming devices for internal combustion engines, an the invention has for its primary object an improved automatic and manually control lable mixin; and charging apparatus, which when attached to or incorporated in an internal combustion or explosive engine, will increase the 'etliciency thereof, and will ef-I feet the explosion of a charge in'each cylinder employed, for everyrevolution of the tiy-wheel shaft. And'tlre invention also has for its object. an improved construction and arrangement of air and liquid fuel pumps. togetherwith governor 'n'ichanism, whereby the engine may be easily kept under control at all times and expand its gaseous fuel according to the load imposed on the drive shaft.- I

With these and other objects in view as will more fully appear as the description proceeds, the invention consists in certain constructions. arrangements and combinations of the parts that I shall hereinafter fully describe and claim. I

For a full understanding of the invention, reference is to be had to the following deseription and accompanying drawings, in

which I l igure l is aside elevation of aninternal combustion engine embodying the improve ments of my invention; Fig. 2 is atop plan view thereof. partly in section; Fi 3 is a fragmentary sectional view; and, l i 4 is detail sectional view of one form of gov ernor which may be employed.

(oi-responding and like parts are referred to in'the following description and indicated in all the views of the drawings by the same reference characters.

Referring to the drawings, the numeral 1 designates an internal combustion engine working cylinder which in the present. instance is shown as horizontally disposed and supported upon a bed .or casing which may be of any desired construction.

2 designates the power piston which is mounted for reciprocation in the cylinder 1,

Specification of Letters Patent.

Application filed March 15,

are? here disclosed for the ward end 21 of a reciprocating rod rod is providedat one end with an eccen Patented Mar. 18, 1 91 3 1911. Serial No. 614,711.

valve. projecting outwardly, as shown, and

being encircled by a'valve closing sprin '8.

A rocker 9 is fulcrumed intermediate 0 its ends on a. bar lO vhich projects outwardly from one end of the cylinder 1, said rocker carrying at one end a set screw 11 designed to strike the outer end of the stem of the. valve 7 when the rocker is moved in one direction. so'as to open the valve againstthe 7 The other end of mittently engagfed by a cam 15 formed on the crank shaft 5. I

1\ll of the before-nalned parts may be ofany desired constriu-tion, design or type and purpose of illus-, tration only in carrying out my invention, I secure to the cylinder 1- an air pump cylinder 16 which in the present embodiment of the in vention extends longitudinally ofthe main or working cylinder 1. The cylinder 16 is provided with a spring closed air inlet valve 16 which controls the passage of air from an air inlet opening 40 to the interior of the cylinder 16 and said cylinder isalso provided with a mixing chamber ltil from which the gaseous fuel passes into the main cylinder 1 a spring closed valve 1 being mounted in the cylinder 1 and opening" inwardly to admit the gaseous charge from the chamber lti" to the interior ofthe working cylinder. The cylinder 16 contains apiston l7 havthrough one end of said aircylinder and which is encircledby an expansion spring 18. The stem 17 is pivotally connected to a vertically disposed rocker arm lt), and said rocker arm carries a. hooked finger 20 which is designed to be engaged by the hooked for- This did.

[ing a stem 17. which projects outwardly trio strap 21 mounted'upon an eccentric 21 forming part of the crank shaft 5. A link 23 is pivotally connected at one end to the rod 22 near the forward end of the latter,

and the other end of said link is pivotally connected tojone armof abell crank lever 2 lrwhich is 'iulcrumed at its elbow on the b d of the engine. The other arm ofirthe be cra'hk 2d"is"connected to the forward f'eiinoiia and 25, and the rear end of said rod is onnecthd to a bell crank 26, one arm of gaged rom the tingemZO andno motion will be imparted to their 'uatingrocker arm 19 which isvconnectedu'to the piston stem 17 of the piston 17 of the air cylinder. As soon as thespeed has dro ped to a redetermined point, it will be un er'stood t at the rod 22 will have been lowered to a point where its hook 21 will engage with the finger 20 upon every rearward movement of the rod 22, thereby repeatedly moving piston 17 and drawing in fresh charges of air. As best illustrated in Fig. 4, the governor mechanism: 1n the present instance includes centrifugall acting bell-cranks carrying adjustable balls or weights 30. v

i The controlling means hereinbefore specified not only serves to control the admission of the air charges, but also controls the admission of the volatile fuel to mix with the air.

A'pump barrel designated 31 is connected to a valve casing 32 which opens into the mixing chamber, 16", as indicated by the dotted. lines in Fig. 2, said valve casing havaftiel" inlet 33 and a spring closed out- 'let valve 34 which opensinto the l ixing chamber 16", so that as the piston of said barrel in the form of a rod 35 moves toward the barrel 34, the same will open and inject a'charge of hydrocarbon fuel into the mixing chamber of the cylinder 16 to mix with the air that has been aspirated into said cylinder by the rearward movement of the iston 17. The return movement of the piston 35 will permit the valvc 341 to close, and at the same time draw fresh fuel into the valve casing 32 through the inlet 33.

The piston 35 is forked at one end and said fork carries a pin 35 which extends transversely through and is movably mounted in the slot of a link 36, said link being pivotally connected at one end to a rod 37 'injecte and said rod being in turn pivotally connected to the rocker arm 19 through the instrumentality of a rod 38. The upper end of the link 36 is pivotally connected to a bell crank hand lever 39, so that by shifting the hand lever, the position of the crank may be changed, that is, it may be raised or lowered. As the arm 19 is rocked, it will obviously, through the connection 38, and 37, rock the slottedlink 36 and thereby reciprocate the iston 35, and it is c1ear,having special re erence to Fig; 1, that b manipulating the lever 39so as to shift tlK? slot of the link 36 along the pin 35, a greater or less stroke will be given to the piston 35 and a reater or less amount of liquid fuel 5 at each reciprocation of the piston 35 into the mixing chamber 16". It will also be understood that by moving the hand lever 39 'to a ppsition where the link 36 comes down on t e pin 35 to the limit, there will be practically no stroke whatever on .the pump rod or piston 35, this manipulation constituting an easy way of stopping the engine. 1

In addition to the foregoing means for controlling the speed of the engine, I provide a hand lever-41 fulcrumed in any desired way on the engine, and 001111 cted at its lower end to a Thelower end of t e spring 42 is pivotally connected to a link 43 and the link is in turn pivotally connected to the rod 25. The spring 42 is'preferabl 'made of flat and thin leaf spring steel w ich will bend either way in the operation of the engin and to vary the tension of the governor t 1 higher or lower speeds, the sprm 42 is fastened rigidly to the lower end 0 the hand lever 41. By adjusting the hand lever 41, the spring 42 may be flexed and thereby increase referably fiat spring42. v

its resistance on the rod 25 and thereby increase the tension on thegovernor mechanism. 4 I

As the operation of the different parts has been described in connection with the details of construction and arrangement of the parts, I deem it unnecessary to further describe the operation except to state that,

as will' doubtless be understood, the air pumpnnd fuel pump are leftstationary so long as the engine is running above or at a predetermined speed and are actuated only when'the speednof the engine falls below such predetermined point at which time the hook 21 of the rod 22 will be lowered and 2. In an internal combustion engine and in combination with the working cylinder thereof, an air pump adapted to pump air into said working cylinder and including a piston provided with a' stem projecting out at one end of the pump, and aspring encircling said stem, and holding the piston at one end of its stroke, said stem being provided with a hooked finger and an eccentric actuating rod provided with a hook adapted to engage the hooked finger, and means connected to said actuating rod and controlled by the speed of the engine for nievin the hooked end of the rod into and out of operative relation to thehooked finger or the piston stem.

3. In an internal combustion engine and in combination with the working cylinder thereof, an air pump adapted to pump air into said cylinder and including a spring held piston, a rocker arm pivotally connected to the piston, an eccentric actuating rod, a bell-crank having a link connection with said rod, and a governor controlled by the speed of the engine and operatively connected with said bell-crank to move the occentric actuating rod into and out of engagement-With the rocker arm.

4. In an internal combustion engine and in combination with the working cylinder thereof, air and fuel pumps operatively con nected to said cylinder and including pistons, an operative connection between the two pistons whereby one will be actuated by the other, means for adjusting the con.- nection to vary the stroke of one of said pistons, a governor, and means controlled by said governor and arranged to operate said pistons at a predetermined point in the speed of the engine.

In an internal combustion engine and in combination with the working cylinder thereof, air and fuel pumps operatively connected to said cylinder and including pistons, an ioperative connection between the two pistons whereby one Wlll be actuated by the other, means for adjusting the con-- nection to vary the stroke of one. of said pistons, agovernor, an actuating rod engageable with said pistons to drive the same in one direction, means for reciprocating said rod, and means controlled by the governor for moving said rod into and out of operative relation with the pistons.

6. In an internal combustion engine and in combination withthc Working cylinder thereof, pumps adapt-ed to pump air and fuel into said cylinder and including pi tons, an operative connection between said pistons, said connection including a rocking link and means for shifting the fulcrum of said link, for the purpose specified, an eccentric actuating rod arranged to operate said pistons, means for reciprocating said rod, and means controlled by the speed of ,the engine for moving said rod into and out of operativerelation to the pistons.

7. In an internal combustion engine and in combination with the working cylinder thereof, an air pump cylinder, a piston mounted in. said air pump cylinder and adapted to pump air therefrom to the work ing cylinder, the piston being provided with a stem projecting out of the pump cylinder, and spring-pressed in one direction, the stem being provided with a hooked finger, an eccentric driven actuating rod'adapted to engage the finger and move the piston against the tension of its spring, a fuel pump ada ted to pump fuel into the working' cylin er and embodying a piston, a hand lever, a slotted link plvotally connected to said hand lever a pin connected to the piston and mova ly mounted in the slot of said'link, an. o erative connection between said link and t e stem of the air pump piston, and means controlled by the speed of the, engine for moving the ac tuating rod into'and out of operative relation to the hooked finger. In testimon whereof, I affix my signature in-presence 0 two witnesses.

ADOLPH P. GUBRUD. [1 s] Witnesses:

F. E. JOHNSON, HENRY THORPE. 

